Ключевые слова: architecture, attraction, beautiful, charming, city, cityscape, colorful, crystal palace gardens, cultural, culture, destination, douro river, environment, europe, famous, garden, gardens, green space, heritage, historic, iconic, jardins do palacio de cristal, landmark, landscape, nature, nature meets city, observation, old town, oporto, palace, palacio de cristal, panoramic, park, picturesque, porto, porto travel, portugal, portuguese, river view, scenic, sculpture, sightseeing, skyline, southern europe, tourism, tourist, travel, unesco, urban, viewpoint,